1.
3n + 5 = 6
3n = 6 - 5
3n = 1
n = 1/3
2.
4 + 5x = 1
5x = 1 - 4
5x = -3
x = -3/5
3.
4y - 15 = -10
4y = -10 + 15
4y = 5
y = 5/4
4.
3 - 4d = 13
-4d = 13 - 3
-4d = 10
d = -10/4
d = -5/2
5.
8 = 9x - 7
8 + 7 = 9x
15 = 9x
15/9 = x
5/3 = x
hope this helped, God bless!
Answer:
D
Step-by-step explanation:
an = 7 - 3(n - 1)
= 7 -3n - 1 *(-3)
= 7 - 3n + 3 {Combine like terms}
= 7 + 3 - 3n
= 10 - 3n
= -3n + 10
-2x+2y=6
7x-8y=-27
5x-6y=-21
-x+y=3
6x-7y=-24
6x-7y=-4(-2x+2y)
6x-7y=8x-8y
-6x from both sides:
-7y=2x-8y
add 8y to both sides:
y=2x
-2x+2y=6
2y-6=2x
2y-6=-12
-6-6=-12
y=-3
x=-6
Hope this helps :)
Answer:
70
Step-by-step explanation:
Assuming that the center of each circle is at point C and D, then both have a radius of 7cm. We know that the formula for solving area of the circle is A=pi*r².
Then we solve area of once circle multiplied by two to get the total area of the given circles. The solution is shown below:
C1 area=3.1416*7²
C1 area=153.9384 cm²
Summation of the area of circle C and D is shown below:
Sum area=2*153.9384
Sum area=307.8768cm²
The answer is 98pi.